Hello community

I’ve a Service fridge freezer, having 2 issues

1- the fridge is full of ice at the back which was not the case couple of weeks ago
2- the bulb light keeps flashing with a sound every time we open the fridge door

Already changed the bulb light, fridge temperature set to 2-3
And there is no switch button inside the side of the fridge, there is a small cap inside there is a connector with a fuse inside that looks ok to me

Please guide me of any solution

Many thanks